Hello everyone! This is deal.II newsletter #167. It automatically reports recently merged features and discussions about the deal.II finite element library.
## Below you find a list of recently proposed or merged features: #12262: Pass 'true' instead of '1' for a function that takes a 'bool' argument. (proposed by bangerth) https://github.com/dealii/dealii/pull/12262 #12261: Use C++11 functionality. (proposed by bangerth) https://github.com/dealii/dealii/pull/12261 #12260: Mark a function argument as 'const'. (proposed by bangerth) https://github.com/dealii/dealii/pull/12260 #12259: Link to new image files in step-35 (proposed by bangerth) https://github.com/dealii/dealii/pull/12259 #12258: Step 66 minor doc update (proposed by gfcas) https://github.com/dealii/dealii/pull/12258 #12257: Fix width of pictures. (proposed by bangerth; merged) https://github.com/dealii/dealii/pull/12257 #12256: Fix compilation with GCC11 and minimal dependencies. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12256 #12255: Fix some GCC11 warnings. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12255 #12254: Fix kinsol (proposed by luca-heltai) https://github.com/dealii/dealii/pull/12254 #12253: Add changelog entry for step-66 (proposed by gfcas; merged) https://github.com/dealii/dealii/pull/12253 #12251: MappingQGeneric: Fix warning about array bounds (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12251 #12250: Fix ParticleHandler::sort_particles_into_subdomains_and_cells() for lost particles (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12250 #12249: Include file in vector_tools.h (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12249 #12248: [WIP] Abort in TimerOutput::~Scope on uncaught exception (proposed by gassmoeller) https://github.com/dealii/dealii/pull/12248 #12246: Fix compilation issues with GCC 11.1 (proposed by mathsen) https://github.com/dealii/dealii/pull/12246 #12245: Move FEPointEvaluation from fe to matrix_free (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12245 #12243: logged step 35 update (proposed by brynbarker; merged) https://github.com/dealii/dealii/pull/12243 #12242: FEPointEvaluation: add change-log entry (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12242 #12241: Uncover bug in N_VClone() (proposed by luca-heltai) https://github.com/dealii/dealii/pull/12241 #12240: remove placeholder changes entries (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/12240 #12239: Merge step-66 - rebased and squashed development branch (proposed by tamiko; merged) https://github.com/dealii/dealii/pull/12239 #12238: Typos 9.3 (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12238 #12236: Refactor FEPointEvaluation (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12236 #12235: FEPointEvaluation::integrate(): zero out solution array also if no points given (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12235 #12234: Add assert for ParticleHandler when particles to be inserted are not found (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/12234 #12233: Optimize FEPointEvaluation::integrate() with tensor product path (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12233 #12232: Fix bug in FEPointEvaluation for certain linear functions (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12232 #12231: Check for availability of points in FEFieldFunction::compute_point_locations (proposed by masterleinad) https://github.com/dealii/dealii/pull/12231 #12230: Remove sundials/copy.h (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12230 #12229: Test new methods of n_vector (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12229 #12228: Dirty fix for the tester. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/12228 #12227: Fixed gradient of tensor product cutoff. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/12227 #12226: Add comment to find_active_cell_around_point() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12226 #12225: Step-62: fix link (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12225 #12224: Guard some simplex test with use_metis=on (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12224 #12222: MGTwoLevelTransfer: fix used DoFHandler (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12222 #12221: FEFieldFunction: Detect case when some points were not found (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12221 #12220: Simplify the example CMake compilation script. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12220 #12219: Remove the base-case overload of cell_measure. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12219 #12218: Fix some simple doxygen warnings. (proposed by drwells; merged) https://github.com/dealii/dealii/pull/12218 #12217: Specify scalar operation result type (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/12217 #12216: Remove copy from SUNDIALS::KINSOL (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12216 #12215: FEPointEvaluation: test FE_DGQ(0) (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12215 #12214: Add some more vectorisation math functions (proposed by jppelteret; merged) https://github.com/dealii/dealii/pull/12214 #12213: MGTwoLevelTransfer: adjust criterion to skip copy (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12213 #12212: Add MGTwoLevelTransfer::fine_element_is_continuous and add missing compression step (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12212 #12211: Accept differently partioned Triangulations in MGTwoLevelTransfer::reinit_polynomial_transfer() (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12211 #12209: Fix two signed/unsigned comparisons. (proposed by simonsticko; merged) https://github.com/dealii/dealii/pull/12209 #12208: Enable FEPointEvaluation to use correct polynomial space (proposed by kronbichler; merged) https://github.com/dealii/dealii/pull/12208 #12207: Add orientation flags to ReferenceCell::child_cell_on_face(). (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/12207 #12206: step-7: Remove doc about default constructor. (proposed by marcfehling; merged) https://github.com/dealii/dealii/pull/12206 #12205: Fix warning in CoordinateRestriction (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/12205 #12204: Fix warnings in step-75 (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/12204 #12203: Check return value of GridTools::find_active_cell_around_point (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/12203 #12202: Avoid warning in MatrixFreeTools::compute_diagonal (proposed by masterleinad; merged) https://github.com/dealii/dealii/pull/12202 #12201: Step 66 Parallel Nonlinear Matrix-Free Example (2. PR) (proposed by gfcas) https://github.com/dealii/dealii/pull/12201 #12200: Make IDA work with new sundials. (proposed by luca-heltai; merged) https://github.com/dealii/dealii/pull/12200 #12199: Allow to enforce unique mapping in RemotePointEvaluation (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12199 #12160: Add simplex/mixed mesh examples to simplex module page (proposed by peterrum; merged) https://github.com/dealii/dealii/pull/12160 #11310: Use the new version of find_active_cell_around_point() in step62 (proposed by dangars; merged) https://github.com/dealii/dealii/pull/11310 ## And this is a list of recently opened or closed discussions: #12252: Step 66 Update (opened) https://github.com/dealii/dealii/issues/12252 #12247: Inconsistent output with complex HDF5 (opened) https://github.com/dealii/dealii/issues/12247 #12244: GCC 11.1 compilation issues (opened) https://github.com/dealii/dealii/issues/12244 #12237: step-19 crashes after 25 time steps (opened and closed) https://github.com/dealii/dealii/issues/12237 #12223: KINSOL not working (opened) https://github.com/dealii/dealii/issues/12223 #12210: Intel compiler warnings (opened and closed) https://github.com/dealii/dealii/issues/12210 #12192: Unique map in RemotePointEvaluation (closed) https://github.com/dealii/dealii/issues/12192 #12189: Check some failing tests for generalized interpolation (closed) https://github.com/dealii/dealii/issues/12189 #12181: Complex examples (closed) https://github.com/dealii/dealii/issues/12181 #12143: CutOffFunctionTensorProduct::gradient is broken (closed) https://github.com/dealii/dealii/issues/12143 #12114: Redo step-35 pictures (closed) https://github.com/dealii/dealii/issues/12114 #12014: FEPointEvaluation does not support `FE_DGQHermite` (closed) https://github.com/dealii/dealii/issues/12014 #11949: Jupyter notebook in step-62 not working (closed) https://github.com/dealii/dealii/issues/11949 #11865: Improve FEPointEvaluation::integrate() (closed) https://github.com/dealii/dealii/issues/11865 #11749: Add orientation flags to ReferenceCell::child_cell_on_face() (closed) https://github.com/dealii/dealii/issues/11749 #10737: HDF5 and step-62 are not compatible with find_active_cell_around_point() (closed) https://github.com/dealii/dealii/issues/10737 #7576: Behaviour of find active cell around point with artificial cells (closed) https://github.com/dealii/dealii/issues/7576 A list of all major changes since the last release can be found at https://www.dealii.org/developer/doxygen/deal.II/recent_changes.html. 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